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STD 12 - 4. principal of inheritance and variation — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYSTD 12 - 4. principal of inheritance and variation1 Mark
MCQ
A man receives his $X$ chromosomes from
  • ✓
    His mother only
  • B
    His father only
  • C
    Both his mother and father
  • D
    Either his mother or his father
✓

Answer

Correct option: A.
His mother only
a
(a)Human male has two sex chromosomes $X$ and $Y$. $Y$ chromosome is contributed by his father that determines the masculanity, the rest $X$ chromosome is donated by his mother only.

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